Chicago Bears wide receiver Brandon Marshall fired back at NFL Network analyst Warren Sapp, the former NFL defensive tackle who called out Marshall as a selfish player and "retard" on The Dan Patrick Show last Friday.

“Good morning, world,” Marshall said in the video. “Listen, I got a very disturbing heads up on something Warren Sapp said. He called me 'retarded.' That’s really disappointing to hear that from an NFL Legend. But I’m going to take this as a lesson. I think we all can learn from this. Be very careful who you take advice from."

There was another reason Marshall took particular offense to Sapp using a derogatory term tied to mental illness. Last summer, Marshall revealed he has been living with "borderline personality disorder" (BPD), something he's working hard to treat with help from others.

"You want to surround yourself with good people, Godly people," Marshall continued in the video, which he shot in his car. "Warren Sapp, I can’t go to him and talk finances because he filed for bankruptcy. I can’t go to him and talk about my marriage because he filed for divorce. I can’t go to him and talk about being a great father, because one day I’m going to have kids, because he’s not active in his children’s life."

While calling out Sapp's behavior in his personal life, Marshall also used the opportunity to raise more awareness about his condition via Twitter:

"Mr Sapp's perception on Retardation is why it's important for us to fight the stigma and educate on mental illnesses http://www.projectborderline.com."